diff --git a/src/org/wordpress/android/WordPress.java b/src/org/wordpress/android/WordPress.java
index dfb0976ebd71..c1b88fdabcec 100644
--- a/src/org/wordpress/android/WordPress.java
+++ b/src/org/wordpress/android/WordPress.java
@@ -1,6 +1,7 @@
 package org.wordpress.android;
 
 import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
 import android.app.Activity;
 import android.app.Application;
 import android.content.ComponentCallbacks2;
@@ -84,9 +85,10 @@ public class WordPress extends Application {
 
     public static BitmapLruCache getBitmapCache() {
         if (mBitmapCache == null) {
-            // see http://developer.android.com/training/displaying-bitmaps/cache-bitmap.html
+            // The cache size will be measured in kilobytes rather than
+            // number of items. See http://developer.android.com/training/displaying-bitmaps/cache-bitmap.html
             int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
-            int cacheSize = maxMemory / 16;
+            int cacheSize = maxMemory / 16;  //Use 1/16th of the available memory for this memory cache.
             mBitmapCache = new BitmapLruCache(cacheSize);
         }
         return mBitmapCache;
@@ -572,6 +574,7 @@ public HttpResponse performRequest(Request<?> request, Map<String, String> heade
      * This class also uses ActivityLifecycleCallbacks and a timer used as guard, to make sure to detect the send to background event and not other events.
      * 
      */
+    @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
     private class PushNotificationsBackendMonitor implements Application.ActivityLifecycleCallbacks, ComponentCallbacks2 {
         
         private final int DEFAULT_TIMEOUT = 2 * 60; //2 minutes
@@ -596,6 +599,11 @@ public void onTrimMemory(final int level) {
             } else {
                 background = false;
             }
+            
+            //Levels that we need to consider are  TRIM_MEMORY_RUNNING_CRITICAL = 15; - TRIM_MEMORY_RUNNING_LOW = 10; - TRIM_MEMORY_RUNNING_MODERATE = 5;
+            if (level < ComponentCallbacks2.TRIM_MEMORY_UI_HIDDEN && mBitmapCache != null) {
+                mBitmapCache.evictAll();
+            }
  
         }
         
diff --git a/src/org/wordpress/android/util/BitmapLruCache.java b/src/org/wordpress/android/util/BitmapLruCache.java
index b986b74d5160..fa18b33faf7c 100644
--- a/src/org/wordpress/android/util/BitmapLruCache.java
+++ b/src/org/wordpress/android/util/BitmapLruCache.java
@@ -14,8 +14,10 @@ public BitmapLruCache(int maxSize) {
 
     @Override
     protected int sizeOf(String key, Bitmap value) {
+        // The cache size will be measured in kilobytes rather than
+        // number of items.
         int bytes = (value.getRowBytes() * value.getHeight());
-        return (bytes / 1024);
+        return (bytes / 1024); //value.getByteCount() introduced in HONEYCOMB_MR1 or higher.
     }
 
     @Override
@@ -27,4 +29,4 @@ public Bitmap getBitmap(String key) {
     public void putBitmap(String key, Bitmap bitmap) {
         this.put(key, bitmap);
     }
-}
+}
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